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Evaluate Open Sentences
Mathematics, Grade 4
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Study Guide Evaluate Open Sentences Mathematics, Grade 4
ALGEGRA:
OPEN
SENTENCES
WITH
ONE
OPERATION
What
Is
Algebra?
•
The
study
of
the
properties
of
operations
on
numbers.
•
Algebra
generalizes
math
by
using
symbols,
or
letters,
to
represent
numbers.
•
It
is
a
problem-solving
strategy
•
Algebraic
sentences
are
also
called
expressions
or
equations.
How
to
figure
out
algebraic
expressions:
To
evaluate
algebraic
expressions,
perform
the
opposite
operation
to
find
the
unknown.
Example:
4
+
n
=
9
9
–
4
=
5,
therefore
n
=
5
Try
This!
5
–
y
=
2
12
+
x
=
32
n
–
6
=
13
a
+
7
=
15
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